| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S] | Wed, Mar 29, 12:25 am | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S] | Tue, May 31, 11:35 pm | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S] | Thu, Dec 16, 1:00 am | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S,SL] | Fri, Apr 16, 2:25 am | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S] | Wed, Apr 14, 11:25 pm | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S,SL] | Fri, Apr 10, 2:25 am | BBC FOUR | 60 mins |
| How to Make: The Toothbrush | 2/3. Designer and materials engineer Zoe Laughlin explores the science - and conducts her own experiments - behind creating a more sustainable solution for brushing our teeth. Also in HD. [S] | Thu, Apr 9, 8:00 pm | BBC FOUR | 60 mins |